Download Aptitude Crack
img not found img not found

Radio Receivers

Q1:

An arbitrary signalm (t) has zero average value and it is bandlimited to 3.2 kHz. It is sampled at the rate of 8 K samples/S. The samples are passed through an ideal bandpass filter with centre frequency of 32 kHz and bandwidth of 6.4 kHz. The output of band pass filter is

A AM-DSB signal with suppressed carrier

B AM-DSB signal with carrier

C AM-SSB signal with carrier

D a sequence of exponentially decaying sine waves

ANS:B - AM-DSB signal with carrier

3.2*8 = 25.6 khz. So it is the total signal sample passing.

Through in a sec. and we have been given that the total bandwidth of B.P.F is 6.4 with 32 khz carrier frequency.

So 32-25.6 = 6.4 so nothing is suppressed.



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.